Lock switch



Nov. 23 1926. 1,608,122

' E. P. HUMMEL Locx` s'wITcH (5 Filed Oct. 3. 1924 2 Sheets-Shea?I 2 ATTORNEY Patented Nov. 23, v1926.

`U-jITliDl "STAT-ES y innalza Yna'.'rf15;!1-\JT oFFlcs.

knnwann 1. HUMMnL, or STERLING, ooLonADo.

Loox SWITCH.

vimplicati@ filed october 3, i924. v'serial No. 741,480.

This invention relates to a locking switch that has for its primary object the construction of a combination lock wherein it is including a switchv structure that can only be moved to a 'closed position under predetermined position of the partsl of the combination loc'k. An object ot the. invention is the construction of a switch that may be opened and closed only by the person knowingthe combination of the lock. Besides the above my invention is distinguished in the novel, substantial manner in which the parts are constructed and associated. Y

lVith these andvother objects in view the .invention will be better understood from the Jallowing description taken in connection with the accompanying drawing, wherein J Fig. 1 is a vertical sectional view of the lock,

Fig. 2 is a top plan view of the dial member, l

Fig. 3 is a sectional view on the line 3-3 vFig. lf is a sectional view on theline 21e-L1 of Fig. 1,

5 is a sectional view thru the base,

6 is a plan vew of the main disc,

Fig. 7 is a plan view of the auxiliary disc and Fig. 8 is a plan viewof one of the lock washers.

Again referring to the drawings illustrating one or" the many constructions of my invention, the numeral 1 designates a base of insulating material securedV to the casing 2 by the bolts 3. This base carries the usual stationary contacts 4 to co-operate with the switch blade 5 secured to a stem 6 as indicated at 7. This stem has one end mounted in the base while the upper end projects externally ot' a housing 8 and has attached thereto a knob 9. A. sleeve 10 is arranged around the. stem 6 and has an arm 11 that is provided with a lug 12 seated in a hole in a base plate 13 that is in turn held against turning movement in any suitable manner.

Mounted upon this sleeve 10 is a plurality of tumblers hereinafter known as main tumbler discs 14. By referring to Figj, it will be seen that the main discA is provided with a plurality of holes 16 adapted to have a changeable connection with pins 17 carried by the auxiliary disc 15. The discs' are provided with co-acting lugs 18 brought I with the link connection 28.

into engagement with each other in the turningof the. disc. The main discs'lll are further provided withrecesses 19 which are brought into alignment with each other in predetermined position with all the discs so as to allow the manipulation of the switch structure hereinafter described. l

Loc-k washers 21 engage the sleeve and properly space the discs. Collar 22 is rotatablyl mounted upon the stem and a portion of the sleeve and it carries a single lug 23 and this collar 22 is rigidly secured to the dialY member 24 by the screw 25, which has interchangeable connection with the plurality of holes in the collar 2,2 so as to allow changing of the combination. Y

The switch blade 5 is provided with al pin 26-passing thru an arcuate slot 27 in the base plate and having pivotal connection This link connection comprises a pair ot links 29 and 30, the latter pivoted to the base plate as indicated at 31 and further carries a pin 32 so positioned as to be held ragainst movement y the disc except whenthe disc has been properly moved to bring the. recesses into alignment in which position the pin 32 is free to move into the recessesv for-allowing movement of'r the switch blade toa closed position. vTo complete the invention the usual electric wires 33 are connected to the stationary contacts.

From the foregoing description taken in connection with the accompanying drawings, it lwill be apparent that by properly shifting and positioning the tumbler discs and by manipulating the dial 24 the recesses will be brought into alignment to allow the switch to be closed by manipulating the knob 9. Thenever the combination is to be changed it is only necessary to disassemble the discs and change their relative relations to each other.

Of course,V it is to be understood that the tumbler constructionmay be designed in various other manners and various other switch structures may be used in the combination and, therefore, I do not desire to be limited in any manner except as set forth in the claims hereunto appended. y

Having thus described my invention, what I claim is:

1. A switch lock including a base plate, a movable switch blade, a locking pin, a member pivotally carried by the base plate and supporting the locking pin and having opn... www

erative connection with the switch blade, an operating member for the switch blade, locling means for the switch blade including a plurality ot' members adapted tor engage-- ment with the locking pin to prevent opera,- tion of the operating member to move the switch blade and having recesses formed therein normally out et registration with respect to each other but movable into regisf tration to receive the locking pin to permit operation oi' the operating member, and means tor moving the members to bring the recesses into registration.

2. e. switch lock including a base plate provided with an arcuate recess concentric with the center thereof, a plurality ot rotatable discs having recesses formed therein normally eut'ot registration with. respect to each other and adapted for registration under certain conditions, means `'for rotating the discs to Vbring the recesses into registration with respect to each other, and a switch structure including a switch blade, an operating member for the switch blade, a guide member for the switch blade adapted to work in the arcuate recess, a movable 'locking member 'for the switch blade, and a connection between the locking member and the guiding member permitting` movement ot the locking member int-o the recesses when in registration with respect to each other and upon operation of the operating member.

3. A switch lock including a base plate provided with an arcuate recess concentric with the center thereof, a switch structure including a switch blade, an operating member for the switch blade, a guide member for the switch blade adapted'to work in the arcuate recess, a movable locking member tor the switch blade, a connection between the locking member and the guide member permitting movement of the locking member upon operation of the operating member, and locking mechanism including recessed members normally preventing operation of the operating member but movable to permit movement of the locking member into the recesses thereot to permit 'operation of the operating member to operate the switch blade.

il. switch lock comprising a housine','a sleeve within trie housing, a plurality oi main tumbler discs mounted on the sleeve having recesses formed therein, a plurality et auxiliary tumbler discs mounted on the sleeve and adapted to have adjustable connect-ion with the main discs, lugs on all of the discs adapted for engagement with each other at predetermined positions of the disc, e' dial member tor giving movement to the discs, an operating knob positioned at the top of the dial member, a stem project-ing from the operating knob through the sleeve, and connectedfor operation with the operating lrnob, a switch blade mounted on the stem, contact elements associated therewith, a pin adapted tor movement within the recesses when in registration with respect to each other, and a link connection between the Vpin and the switch blade permitting op-V eration of the pin upony operation ot the stem.

In testimony whereof l aiiiX my signature.

EDWARD P. HUMMEL. 

